LED Subpixel Layout for Wide-Angle Color Shift Reduction
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Solution Overview
Problem
Curved displays experience color shift due to differences in viewing angles between red, blue, and green lights, asymmetry of LED pixel chips, and pixels blocking each other's light, which degrade the viewing experience.
Innovation Solution
The display panel design includes LED pixels with first, second, and third subpixels arranged in specific directions and polarities, surrounded by optical retaining layers or encapsulation structures to achieve light field symmetry and minimize color shift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If curved displays are used to enable multiple viewing angles, then viewing angle versatility is improved, but color shift occurs due to differences in viewing angles between red, blue, and green lights
Solution Approach 1:
The display is segmented into multiple LED pixels, each pixel is divided into three subpixels (red, green, blue), and each subpixel is further divided into multiple light-emitting chips. This hierarchical segmentation allows independent optimization of each component's light field characteristics to achieve overall color consistency across viewing angles.
Solution Approach 2:
The patent employs asymmetric arrangement of light-emitting chips within subpixels and uses optical retaining layers with asymmetric structures to compensate for the inherent asymmetry of LED light fields. By introducing controlled asymmetry in the optical path, the patent balances the viewing characteristics across different colors.
2Adaptability or versatility
If LED pixels are arranged with large viewing angles, then viewing angle versatility is improved, but pixels block lights of one another causing color shift
Solution Approach 1:
Optical retaining layers are introduced as intermediary structures between adjacent LED pixels and subpixels. These layers act as mediators that guide and separate light paths, preventing light from one pixel or subpixel from blocking or interfering with adjacent pixels, thereby reducing color shift while maintaining wide viewing angles.
Solution Approach 2:
The patent introduces vertical dimension elements through optical retaining layers that extend above the pixel plane. This adds a third dimension to light management, allowing light to be channeled and separated in the vertical direction to prevent horizontal blocking between pixels.
3Manufacturing precision
If optical retaining layers and encapsulation structures are added to achieve light field symmetry, then color consistency is improved, but device complexity increases
Solution Approach 1:
The optical retaining layers are designed to perform multiple functions simultaneously: they provide light field symmetry, prevent light blocking between pixels, offer mechanical support, and serve as part of the encapsulation structure. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the viewing experience at wide angles by reducing color shift and optimizing light field symmetry through subpixel arrangement and encapsulation.
Implementation Method 1
A display panel includes a substrate and a plurality of light-emitting diode (LED) pixels
Data Source
AI summary
A display panel includes a substrate and a plurality of light-emitting diode (LED) pixels. The LED pixels are located on the substrate, in which each of the LED pixels includes a first subpixel, a second subpixel, and a third subpixel. The first subpixels of the LED pixels are arranged along a first direction. Each of the LED pixels has the first subpixel, the second subpixel, and the third subpixel in order along a second direction. The first direction is different from the second direction. The first subpixels, the second subpixels, and the third subpixels of adjacent two of the LED pixels along at least one of the first direction and the second direction have different polarity directions.